Calculating attachment.



BATENTBD 'MA-Y 26, 1908.

` 11 sums-SHEET 1.

INVENTOR S H C DUNGAN & J M HUGKINS. GALCULATING ATTACHMENT.l APPLIUATIOH FILED JULY 8, 1905.

v 1 e Q WITNESSES:

. ...n J w ed u l T un a .SV n WS. m) n u NCMk N w@ m S Tl T mM T, m J A m Hf H G DUNGAN & J M HUGKINS CALGULATING ATTACHMENT.

APPLIUATION FILED JULYQ. 1 905.

waTNEssEs:

No. 333,598. BATT-:NTSB MAY 26, 1908.`

' H. o. DU'NGAN an J. M. HUGKTNS.

GALGULATTNG ATTACHMENT. y

APPLGATION FILED IU'LYS. 1905. I

11 SHEETS-SHEET 3.

l T mmm L A l i: WWNESS E5: L ATTORNEYS y mms rnznsmrhummwnsmnawl u c PATBNTED MAY 26, v1908.

' No. 888,598. PATENTED MAY 26, 1908.

H. C. DUNGAN & J. M. HUUKINS.

GALCULATING ATTAGHMENT.`

APPLIATION FILED JULY 8, 1905.

11 SHEETS-SHEET 5.

n/ Irn ATTORNEYS,

.wus rams. ma, 1.1 nw.. msnmavm, n4 c.

No. 888,588. PATBNTED MAY 28, 1808. y

H. 8. DUNGAN 8 J. M. HUGKINS.

GALCULATING ATTACHMENT.

APPLICATION FILED JULYS. 1905.

V11 SHEETS-SBEET 6.

INVENTUM wnNEssEs:

J/w, C ,y

w ATTORNEYS PATENTED MAY 26, 1908.

H G 4DUNGAN & J M HUGKINS CALGULATING lAT'IACH'MEII'I.

APPLIouIoN FILED JULYs 1905 11 SEBETFBHEET 7.

INVENTQR ATTDRNEYS PATENTBD MAY 26, 1903. H, o. DUNGAN a J. M. HUCKINS- 11 SHEETS-.SHEET 8.

BY I @l 7 uhh..

GALUULATING ATTACHMENT.

WITNESSES:

www

No. 888,588. 8 PATBNTBDMA-Y 28, 1908.

AH. 0. DUNGAN & JIM. HUGKINS. GALGULATING ATTACHMENT.

APPLICATION FILED JULY 8, 1905.

11 sHETs-SHBM 9.

' ATTORN EYS No. 988,599. PATENTE) MAY 29, 1998. -H. GfDUNGAN' L J. M. HUGKINS.

ALCULATING ATTACHMENT. lAPPLIGMION FILED JULYB,1995.

1i sHEBTs-SHEHT 1o lNVENTUR if WITNESSES:

f Ma;

ATTORNEYS mms runs :ne 4 uma., mm n c.

No. 888,593. Y l PATENTED MAY 26, 1908. H. e. DUNGAML J.' M. HUGKINS.`

CALGULATING' ATTACHMENT.

APPLIOATION FILED IULYB, 1905.

.` 11 SHBETS-SHEET l1.

mvENToR .Mr a a `/m/ ATTORNEYS BY (J,

UNITED srngnsgrgnxr OFFICE;

HARRY C. DUNGAN, OF JACKSON. AND JAMES M. IH'CKINS. OF SPRINGFIELD. OIlIO; SAID I UUKINS ASSIGNOR T() EDWIN JONES, OF JACKSON, OHIO. V

cALcULATNG ATTACHMENT.

iva-scenes.y

To all whom it 'may concern.' v Be 1t known that we, HARRY C. DUNGAN and JAMES M. HU'cKlNs, citizens of the- United States, residing, respectively, at Jack.-

son and SprhigfielfL-in the counties of Jackson and Clark,respectively,.and State of Ohio, have invented certain new 'and useful device which may be readily attached to any 'standard make. of typewriter without mate -rially altermg the construction ot the same,

and which when so attached may be operatedl by thenumeral keys of the typewriter land properly positioned to make the correct.

calculation by the tabulating mechanism commonly employed on modern typewriters.

It is further contemplated in the production of this invention to provide a simple motor for operating the numeral wheels'and also'tocaus'e said motor in operating to slight-ly overthrow the numeral wheels, Athereby assuring that the latter are moved sides in means whereby, the calculating mechanism may be thrown out of operation and the typewriter manipulated in the usual manner. v f

Another novel vfeature of construction lies in the manner of att-aching the device tothe typewriter, whereby the-parts are. positioned, operatedv and returned totheir normal p osi tions without the manipulation of other keys buttons or's'hifting devices than the ones usually manipulated in theo eration of an ordinary typewriter. and tabu ator.

Finally the object. of the invention is to provide an attachment of the character described that will be strong, durable and ef' lcient, comparatively simple and ineXpenysive to produce 'and one inwhich the several parts will not be liable to get out of workingv order.

With .the above and' other objects. inview, l

the. invention consists of the novel details of construction and operatlon, apreferable embodiment of which is describedin Athe' specication and illustrated i'n the accom-A 4 panying drawings, wherein-f- Figure 1 1s a side elevation of a portion of- Specication of Letters-Patent. Application filed July 8, 1905. Serial No. 268,875'.

Patented May 26, 1908.

an ordinary typewriter, showing our attachment-'applied thereto. Fig. 2 is an elevation of the opposite side to that shown in Fig. Fig. 3 is a rearelevationof the attachmn and typewriter.^ Fig. 4 is a lan view. Fig. 5 is a longitudinal vertice sectional view taken on the line :r :c of Fig. 4 and looking in the direction of the arrow a. Fig. 6 1s a longitudinal vertical sectional view taken on the line y y of'Fig. 4' and loolting in the direction ofthe arrow b. Fig. 7 is arear elevation of a portion of the typewriter frame and the 'i attachment, the counter, stop levers and back plate of the angular trame, being removed. Fig. 8 is an inner elevation of theatta chinent removed from the typewriter, the counter also being omitted. Fig. 9 is an inner elevation of the motor and its winding and releasing mechanism, the latter being shown in its arts released.'

lowermost position and the Fig. 10 is a vertical sectional view on the line B B of Fig. S and looking in the direction of the arrow B. Fig. 11 is a side elevation of the motor, aportion of the winding Wheel lie- .ing broken away to show one of the'olutch members. Fig. 12 is an elevation of the opposite side of the motor,.themotor releasing plate being broken away .to illustrate the motor stop arm dog. Fig. 13 is a horizontal y cross sectional view of'the motor taken onr thelinex .fr of Fig. 1 2. Fig. 14 is a detail side elevation of the escapementoperating mechanism, showing the supports for the same in vertical section. Fig. 1'5 is an inner elevation of the reciprocating frame 'and p0rtions of its cooperating parts, the sideslof the angular frame plate beingshown invertical? section. Fig. 'i6 is a side elevation of'the tension pawl, a portlon of the winding ratchet and coacting parts. Fig. I7 is a transverse sectional view tal'en .through .the counter,

the carriage being omitted and the Shafts f' shown in section, and Fig. 18 is a side elevation of one of the numeral wheels showin its pawl and ratchet construction in dotte lines. I

In illustrating theinvention, we. have shown the attachment Vappliednto what. isV

commonly .lfnown as a Smith Premier typewriter, butit is to beunderstood that the attachment may be ap. lied to any of the well known standard mac ines,

In the drawings, t-he numerall 'designates the Inain' frame of the typewriter, 2 the carmage platform and thekey board. On the platform 2 the ordinary carriage 4 is mounted in the usual manner. Any suitable form ol tabulator .for causing the carriage vto'. be moved to a predetermined point may be employed, 'but we prefer to use the tabula'tor "'shownjn the drawings which is now being.,r

more commonly attached to typewriters, as .its construction permits of itsready .application without materially altering or interfer- .iv-.

ing Withthe usual oicration' of the type writer. Therefore in l3`ig. 4, wc have shown the graduated stop bar 5 ofthe tabulator supportedfrom the rear side of the carriage 4 "andthe tabulator stop levers .6' secured on 4 the frame 1 in the usual inanner. These levers 6 are pivotallysupported on the shaft 11 (see Fig. 2) and sprea apart at their lower ends, at which point they are pivotally con- 'nected to the .tabulating key rods 7, the lat- 4terextending forwardly beneath the machine and supported in the usual indicating brach et 8, the said rods extending slightly 'forward 4olf-fthe.bra cliet and carrying the keys 9 on their outer' ends, as 4best sb own in Fig. 4. On 125' l'fthe different-keys are arranged over the rods the 'bracket 8 the' usual symbols designating 7 ,in the usual manner. On the tabulator bar 5- the ordinary stop piece 1U is arranged so as toengagewithany one ci the stop le vers whichmay be projected into its path .bythe depression of the tabulator l\'eycone5, Tof v thelfeys-Q is depressed or pushed myx-iard, the-lower end of its res ective stop lever G' nected .therewith-f The tabuiator 'stop lelvers '6 are piv'ote'd on the rod 1 1 which is sup ported in the tabulatorfraine '11a (see Figs.

Zend 4)..44 It 'will be apparent tliatwhen one be swung' outward y 'and rearwardly,

- while the upper curved endof 'the lever will be swung inwardlyand forwardly and caused "toprojeotinto the path of the stop` piece 1() which will abut `the saidlever an( stop .the carriage at ,the proper predetermined point,

. jtlie carriage havingr been-released and allowe d to travel in the usual .mannen Our attachment comprises a lower align,-

lar frame plate 1.2, rigidly attachedV to the lower rear portion of the traine 1' by. screws 13 -at each side thereof. The frame plate 12 5.0i

supports' along its rear upper edge, an outwardl' bent and upwardly extending bracket 14;-4 he bracket '14 is provided about 1nid- 4'Way its heiUlit with a transverse shaft 15 on 'which sto ievers 16 arepivotally mounted. 55 Iii "Heide, collars 17 and. 17 a, the collar 17a being Eachof t e stop levers iasseeui'edrto its considerably longer than theothcr collars, so as to' separate the two stop levers between which it'is disposed.A By referring tolig. 3,

it VWill beapparenty that the collar 17 a is a1- raniged between theysecond and third. stopA leiaeiis from the right, thereby providing a .period space,V as the first two stop levers 16 0in` the-right in the saidiigure, are con- 'nected to the tabulator stop' levers con-y to rewind the drum.-

trolled by the units and tens keys as will hereinafter be described. The collars are xed to the st o' levers and encircle the shaft 15. Between t e end of each collar and the 'with the sto) leversV above and below t e shaft. 15 on w ich they are pivoted, the 'same lare normally' forced outward as shown in Fig. 5. The upper ends of the stop levers are bent sharply at an angle and roject inwardly through a slotted guide p ate 2() secured in the upper endfof the frame 14. The sto J 'levers 16 project inwardly at their lower each other.l stop levers 1G are slightly bent and bifurcated as indicated at 21' in Figs-6 'and 8. There being as inany stop levers 16 as there are tabulator stop levers 6, the bifurcated ends 21.0f the-former are engaged about the rear side of each 'of the said tabulator levers. In

lso

en .s and are bent so as toY converge tward The extreme lower ends of the this manner when one of the tabulator keys is dern-esser! and its stop lever 6 swung rearward at its lower end, the stop lever 16 connected to the stop lever will also be swung rearward at its lower end,causing it to berocked on the shaft 1.5 against the tension of its respective spring 18 and its inner end swungV inward beyond 'the inner face of the ,fijuide plate 20. When ressure is relieved spring 1'8 will swing the stop lever 16 to its norm-al position. Supported between the Yframe 14 and the tabulator frame 11'n on.

brackets 22 and 23 and projecting upwardly `'roin the angular frame plate 12, is adouble grooved rail 24. which extends some distance to the lef t across and beyond the frame 14 as.

shown in Fig. 3. About the rail 24 We arrange a counter carriage 25 suitably supported on ball bearings 26 as shown l1n Fig.

-.'. To the right hand end of the counter carriace25 referring to Fig. 3, We attach the 4on? of a thin metallic tape 27. which .passes abouta suitable spring drum 28 mounted on the inner end oi'- the rail 24 as shown in the said figure. tThe sp1-ing druin 28inay be of any approved construction and i's provided with a winding knob 29 by which it ma be maintained at the desired tension. his

drum acts to wind up the tape27 and draw" the counter carriage along the rail when the carriage is released, the returning of the carriagc and the unwinding of the tape serving Secured' on 'the Vlower rear side of the.v counter. carriage 25 isav toothed escapeinent bar 30 which is adapted `on the tabulator key an( thetabulator-v stop I lever swung back to its normal position, the

be engaged by the escapement 31, the latter being pivotally ysupported'y in an varm 32 projecting from an angular extension 33 of thebracket 23, as shown in Fig. ]4. The

escapement 31 is xed on -the end o f a rock shaft 34 mounted in the arm 32. A s .ring 35 is confined on the shaft 34 between t 1e inner vside ofv the arm 32 and a crank arm 36 secured on the inner end' of the shaft. vThe spring 35serves to normally hold the escapementl against the arm 32, but to allow the shaft 34 to bemoved longitudinally to force ythe escapement, out of .line with the toothed escapement bar 30. This movement of the shaft vand 3 escapement is accomplished by means of a bell crank lever 37 pivoted on the screw 37 which is supported onthe end of an` arm 37b mounted on the inner side of the frame 14 (see Fig.v 5), the said bell crank having Aits upper end bearing against the Acrank arm '36 as shown in'Fig.l 14 and Yits lower end bent at right angles and bearing lagainstfthe inclined `face 38 of'a bridle arm 39*Z as shown in Figs. 2, 3 and 1 4. The bndle arm 39 forms a part of ,a U-sha'ped bridle passing across the rear side of the stop levers ,16 and pivotally su ported on the shaft 15 as clearly shown in i f. 3. The bridle is yieldably held in .contact with the stop levers vb aspring '41 lcoiled about the elongated co ar 17n and having one of its free ends in enga ement with the bridle and its other free en caught about the yoke 19 'in substantially the same manner as the.

coiled lsprings 18, thus when one of the stop levers 16 is-manipulated the bridle will be v' swung outwardly causing its arm 39 to be rocked-0n the shaft-15 andthe bell crank 374 also rocked and its up er end swung inward. :"The uplperend of t 4e bell crank bearing la lainst t e crank arm 36 as described,.moves K t e shaft 32 longitudin-ally against the tension of the s ring 35, thus forcing the escapev ment 'out o line 'and engagement with the -escapement bar 30, the counter carriage 25 thus being released is -drawn by the tape 27 until the end of the escapement bar encoun- -ter's the upper end df thestop lever 1-6wl1ieh has been projected into its path. The counte r frame is thus" simultaneously positioned with the typewriter carriage 4 by the depres- 'sionv of any one of the tabulat-or keys 9.1

When ypressure is relieved on the tabulator key and thestop: levers 6 and 16 swung to their normal positions in the manner described, the bridle will be returned to its original position .by the spring 41. and the spring A35 allowed to drawthe escapement back into line with the escapement bar 30 oiwith which it will engage and thus hold the carriage at the point to which it has been move" For returnlng the counter carriage 25 to its normal positlon, we mount on the tabulator bar 5 a' U-shaped bar 42 having its Arealt side disposed atan angle from which a `fixed arm- 43 projects downwardly. `The' arm 43 carriesa horizontally disposed headed Ipin-14 which is adapted to engage with the side of the counter carriage and move the same along the rall 24 when the o erator moves thetypewnter carnagel 4 bac tolts 'starting point in thevusual manner.. This returning of the counter carriage .unwinds the tape 27, thus rewinding the spring drun1 28 hereinbefore referred to. As" the carriages are returned, the inclined portion of the bar 42 engages with the upper end of an angular lever 45 pivotally mounted on a screw 4 5a (see Fig. 1) supported in'the vertical bracket 22. rlhe lever-45 is formed at its rear end' with a vertical lug 45b and a curved slot 45c through which a screw 45(i is loosely passed and driven into an extension 22a of the bracket 22. The 'lug 45'? is normally held depressed by a coiled spring 46 engaging with the lever 45 above its pivot point, and fastened to the bracketV 22. vThe movement of vthe lever is limited-bythe slot 45c and-its upper end is thus held in position to bereadi v engaged bythe bar 42. -A's the end ofthe said bar encounters the lever 45, the same is rocked and its lug/15b swungupward' so as jto engage the underside Aof a downwardly bent leafsprmg 47 mounted on the undersldeV of the. counter carriage, which sprin T will ride alongthe upper edge of the lug and drop4 belnnd the same 'when .the carriage has reached its startmg point, thus locking the same against travel. When any of the tabumoved into and out of engagement with the teeth of the rack bar 30,.0 loosely attach to the crank arm 36a` link 48 pivotally connected at its lower end to a second. crank arm 49 secured ou a crankshaft 5() mounted in the bracket 23 anda bearingl lug 50a 'projecting upwardly from the ,rear plate 12 as'clearly set forth in Fig. 14. A spring 50b coiled about -the crank shaft. 50'and`fhaving its free ends engaged withthe crank arm 49 and bearing lugl 51) acts as ,a tension devlce to fore-e thecrunk armupward and hold' one end of theescapement in contact withthe escapement bar. AThe crank shaft 50'projects through the bracket 23 and carries on its downturn'ed end a horizontally projecting pin 5] whichengages in a loop 52 pivoted'on a rock arm 53 (see Figs. 5 and 7). The rock arm is secured on the end of the rock shaft 54 connected to the letter O key of the and 6, butwith their pins projecting 'towriter, the' said shaft having been extendu ed through the rear of` the mainframe 1,

thuswh-en the O key which'serves for 'the symbol zero, is depressed', theshaft 54 is rocked in the usual manner, swinging the 'rock arm 53 downward which in turn pulls the loop 52 also downward. The loop 52 be `'ing' connected to the in 51 rocks the crank shaft or kwings it toV t e lright;reference being had to Fig. 7. The movement thus im'- parted to the crank shaft 50'is transmitted to l the crank arm 49, which being swung downward causes the crank arm 36 to be swung i the zeroV as hereinbefore dflstribed.l `The frame is engaged aboutthe rock shafts and lower slotted ends a supported in bi' furcated lugs 55b projecting inwardly from each side, of the angular frame plate l2 and .provided with pins 550," with which the slottedportiorisengage. The. frame is recip-l rocated by means'which will'be hereinafter described.' A lug56 projectsiupwardly from the frameV 55 so as to engage `with the horizontal pin 51 and swing` the crank shaft 50 `when the frame 55 is movedto the right, op-

erating the escapement in substantially the same manner as itis operated by the loop 52,

the 'said loop allowing the pin 51 to be swung as'will be obvious. l f y The frame 55 ismovedin one direction by'V the mani ulation .of the typewriter keys, or that is, -t ielkeys' which bear the'nuinerals 1,

2, 3, 4X5', 6, 7,8 and 9 these keys are ar `ranged on each side vof the machine and, are

v connectedrach to a rock shaft .Bel-extended and manipulated in substantially the same manner as the rock shaft 54 4connected with 4 (ajnd provided with a pluralityof rounded of the lugs 57'.

of the frame. f struction of the typewriter with whichwehave lugs 57 projecting'jn juxtaposition to the shafts."` ,On each ofthe shafts, weiniount small crank arms' `58 eachprovided with a laterally extendingpin 59 to engage with one These crank arms are disposed in staggerelfrelation on opposite sides of the frame 55 as clearly illustrated inFigs.

ward each other 'so as to engage with the lugs Owing to the 4pecilharjconu illustrated our attachment, 'the rock shafts .54 connected to the numeral ke V's 2,3, 4:v and 5-arranged on the left'hand si e of the mal chinek with reference to Figs. 1,4 and .115, are

rocked .in a direction o posite' to the direc# tionin which lthe rock s aft-s 54 connected to` the keys 1, 5,7, 8 and 9 arranged on the right l hand side of the-machine, thus when any one of the sa'idkeys is depressed, the frame 55 will be moved in 'the saine direction, that is,

-to the'left with reference to the said iigure.

This is caused by the fact that the lugs 57.

-project in the same direction and .the crank 'arms 58 vconnected to the numeral keys 2, 3,

4' and 5 being swung downward and the crank arms o erated by the numeral keys 1, 6, 7, 8 and 9 lieing swunr upward. The numeral key 1 being out oi2 line with the other keys, has mounted on its rock shaft 5 4 a sleeve 5t".a from which rejects a lug59? en-` gaging'with a rounded' ug 57a similar to the' lugs 57 and projecting in the same direction.v upward or moved in the same direction as the crank arms 58 on the right hand side of the machine with reference to Figll. The movement impart-edv to the frame 55 is slight being merely enough to im` parta limited rockmgmovement Vtoa bell crank lever 69 to which it is-connected `by a stud 61 working in a slot 61 formed in the upper portion of thiframe. 5 5 as clearly shown 1n Fig. 15. The wer portion of thls bell crank is connectedvith a coiled spring 62, thelatter being engaged over a rod 63 supported in lugs 63L` projecting inwardly lrointhe side of the frame plate 12. This spring 62 not only serves to return thelever 60 to its normal position, but rplates the reciprocating frame' 55 under vtension and causes-it to be swung to the right when the Jressure' on one ol v'the numeral keys is relieved, the' reci rocatingframe thus get-ting' Vits movementt nough the crank arms 58 and the spring 62. "Y,

'Ve will now describe the generalconh struction and arrangement of the counting or registering device mounted on the counter carriage. This counter device Vor register has been made the subject matter of ra separate application iile'dby VHarry C. Dungen, December 19,- 1904, and bearing'Serial Num'- ber 237,459 and therefore it willl not be necessary to enter into @1 /detailed description of. the device,v except )as tof'certain improvef ments in the counter n 'hi'cli have been 'iliadev since filing saii'l application.

The counting or registering device comprises three shafts f 64, 65 and 66 rigidly mounted in' the upper rportion of the Acounter carriage.' vOri the shaft 64 we mount the numeral wheels 67 which beginning at the righ-t of Figi 4, con stitute the units, tens, hundreds, thousands, tens of tho usands, hundreds of thousands and millions wheels'. 'I'hesewheels are provided with 'peculiarly shaped teeth for engaging a common operatingagent" as set forth in `the said 'former application. However, instead- Aof making all the teeth about the peripheryof each numeral wheel, ofthe same length,we propose-to cut oii" everyoth'er tooth 67 and ,to position these'cutfotfteeth between the ceases first or units wheel, which has allits teeth of the same length. On the shaft 66,' we mount the transfer Wheels 68 which cooperate with the numeral wheels and their. parts in :the

same'manner as set forth in said previous application. The numeral wheels as brought out'in said previous 'a ,plicatioln are capable of being independent y operated and thus anyoneofV the numeral wheels may be en gaged-w'lth a common operating agent and ladditions expeditiously made. -On the shaft 65 .which yis arranged over the shaft 66, we

mount locking dogs'69, each having one end in engagement with one of. the `numeral wheels and it's other end'in engagement with l The mainA purppsc'of these lockin dgs is to prevent overone of. the transfer wheels.

throw of the whee of the next higher denomination when the transfer wheel is operated to, transfer an. addition from the next wheel f lowerdenomination. By shorten-v ing or c uttin'g off every; othertooth ofthe numeral wheels and .placing the short teeth between the figures, when, one of the dogs is swung ,by the transfer device, its end pro* jecting over the teeth'of the numeral wheel will be swung downward not far enough to engage with the-short tooth which will pass under it, but low enoughto engage with the next long tooth opposite thenext higher fige! ure, thus preventing the numeral wheel from being overthrown. A coiled spring 70 engaged-'about each dog is connected to the vtransfer shaft 66 and serves to return the dogs to position after theyhavebeen swung bythe teeth of the transfer wheels. The teeth of the numeral wheels are adapted to engage or slide between the teeth 71 'of the motor wheel 72, the counter carriage being positioned s as to bring the proper nirmeral Wheel into engagement with the teeth oi the motor wheel and the latter released so as to revolve'and turn the numeral wheel the distance re uired to make the proper addition.

We wil now proceed to describe the construction and operation of the motor and the means for allowing the same to move the proper vvpredetermined distance to register the correct addition. v-

The motor'comprises a main shaft 73 which is -mounted in suitable bearings in a vertical extensionoi thebracketZS-and the inner side of the bracket- 22. The motor drive wheel 72 is loosely mounted on the "shaft73vand 'hassecured upon one sidean Y annular housing 74 in which is confined al flat coiled spring 75 as clearly shown in '13.

The spring 75 `is fastened at one end-tp the inner peripheryr ofthe housing and is coled' about an arboror sleeve 76 which projects.

shown in Fig. 3.

from 4'The tension paWlS? at its upper end engages 7 7a mountedon the extension 23 -jacent to .the housing 74"and having oli-its outer face an integral clutch member- 78 which is adapted 'to be engaged by a slidingl 22 the opposite end of the' tape is secured to the underside of a bar 83 projecting from the left hand end of the U-shaped bar 42 as A suitable mechanism hereinafter described, operates toV move the winding wheel 80 so as to. throw its clutch member 79 into engagement with the clutch member 78 of the winding ratchet 77 and thus winding the spring 75 -by means of the arbor 76 when thetapc Slis unwound from the winding wheel, which occurs when the carriage 4 of the typewriter is being returned Vto its lstarting point. In this manner the coiled spring is constantly wound up and suilieient power provided to operate the motor wheel under all conditions. When the spring has been fully wound, it is obvious that some provision for throwing the clutch members out of engagement must be made and .we have ,therefore constructed certain parts, which act not only to throw the clutch Y,

members out of engagement, butto throw them into engagement when the spring has lbeen wound to a predetermined point, when the spring 7'5 has been unwound to a certain' degree, thus providing automatic means by 'which thev spring is at allltimes maintained in working order. illustrated in Figs. `8 and 16. For sliding the winding wheel 8O so .as to throw the clutch members into and 4out of engagement, We

rovide the same witha grooved collar 84.

This mechanism is best n the grooved portion of the said collar," the bifurcated end of a bell crank lever 8'5 engages. The lever 85 is pivotally mounted in the bracket 23 as clearly shown in. Fig. 8 and has its lower 'end engaging in the slotted offset portion 86 of a tension pawl 87, as shown in Fig. 16, the said tension ipawl having its lower end slotted as indicate hawe a slight vertical movement projeeting'through the' said slotted er'itension 23 of the brac 'et' 23.

85a is of sufficient s'trengthto slide the winding vwheel 80 and its clutch member 7 9 into engagement with the clutch member 7 8 of the windingratchet when the spring 75 'on a pin 87b y ortion i reaches its low degreeof tension. The windingratohet 77 being given a slight backward ,movement by the tension- -paw'l 87, it is fforced downward by the lower end o the le' ver 85 when the same isswung as shown in Fig. 16. The tape 81 being unwound when the typewriter carriage `is returned t its ,starting point, the winding wheel `is l unwound against the tension o i' a spring 80,"`

vcoiled about the'shaft 73 and secured 'at one'. end to. the grooved collar 84 and itsvopposite ,endto'the bracket 22;' As theta e 1s un- 'wound and the Winding wheel 4revo ved ,f the teeth of the clutch members will engage and ip the motion imparted tothe winding ratchet 7 'i' and the spring 7 5 'woundby the arbor 76, the .pawl 87 during tl'sm't'ion slip- Itinue. until the spring v755 has been wound to` posite directiqii; thus pulling on the pawl' 87` ping: over the teeth of the winding ratchet.

the-typewriter carriegfe is moved .during 1 lthejgwritin'g operation, the 'tape '81 1 is wound Vabout. the Wheclfwhich is revolved bythe spring 80, the teethohthe clutch members slipping' over eachotller andV thle winding ratchet being held by. the tens-ion pevl 87'.- This relation 4of parts will conits' high degree so that its tension will overcome the tension Ior expansionbf the springy Y whenthis' degreeis reached, the spring 75 have a tendency to unwind, which will cause the-Windingratchet to move in the op'-4 having slight vertical movement, will be'drawn'npward; thus through its connec-f' "tion 'with the lower end of the bell crank 85,

`the `same so as toslide the winding "whee and 'its clutch member-out of 'engagement with the' clutch member/of lthe winding So long as' the tension of the spring members into engagemeiitl From this def 'Scriptiom it is thoughtl that the winding operation willbeclea 4 i g lOi'thc op osite. side of the n'rotor wheel 472, we secure f fasten a toothed locking ring 88.1" This locking ring is best shown in Fivs.

V9,110,12 and 13, andas is apparent leaves t eV 4central portion of; thc motor `wheel unobstructed. Near its central portion and with- 'in the locking ring 8h', the motor wheel Vis formed with laterally projecting bosses S9 to which is securely fastened a ratchet wheel 9U loosely encircling theshnl't 725.

mounted on the shnl't `73 adjacent to the' Swinginglj" ratchet fl() is a stop arm Ul.v rl`he swinging arm isfornied with :rn integral sleeve exten, sionr91a'on which 1s llxed a collar Ell" ars ranged in juxtaposition to the swinging stop arm so as to provide annrrow .space lor a ver tically movable release plate SI2.- 'lhat portion ofthe release plate extending about the sleeve 91:a isslotted as indicated at,92 in Fig. 12. A spring 93 coiled about the sleeve 91a and has its freelcnds secured to the collar 91"' and a pin Qliprojectng from the of the said spring, there y twisting or fwindi ing the same, so that when thesaid stop arm 'is again released the coiled spring will act to return it to its normal position. It will be yapparent that the outer end of thecoiled spring 75 being connected to the motor wheel thronglrthe housing 7 4, and the ratchet wheel 9U being connected to theV motor wheel', when the parts are released, both the mehr wheel and the ratchetwill be rotated and foniinparting motion or swinging the stop arm 91, we pivot onthe outer end there* olf awspringpressed dog 94 which engages with the teeth of the ratchet 90. The dog is provided with a laterally projecting pin 9115*.Y

which is adaptedto travel in acurvedslot 92" formed `iii-tile upper portionlofthc re'- lease. plate 02 and normally restsin the seat 5- 92 formed at the rear end of thesaid slot as "set-forth in Fig` L l agilinst the dog'and -th'e dog Vheld in position by its pin resting in 'the side of the slot, the

motor wheel" is thusheld against mvement.

5;. f'lhe ratchet 90 bearing v For "releasing the swinging arm and the rnotoxgk we -provide the bell crank lever 60 liereinbefore'referred to with two arms 60 and 60"," the latter of which carries ahorizontal pin 60c as lshown in Fig. 9. y 60 engages in an inclined slot 6()d forniei in the upper central portion of a lever 95 pivot-al ly' mounted on the bracket 23 and having 'a bifurcated'- end'95 which engages about-a short pinQUb projecting from the rear side of arod 90C'secured'to the lower .end of the re- The f in :los

lease plate 92 and having its lower portion loosely supported in a guide bracket 90d arranged on .the rear side of the bracket 2311s shown in Fig. 9. The bell crank lever 60 when swung b v the frame 55 as before-described causes the lever 95 to beA swung pin\60*. The

downward by means of the lever on beingswung downward through its engagement `with the rod QUCdraws the release plate 92 downward and the seat 92c from about the pin 94a. The pin and thus the dog 94 vbeing released, the motorr spring 7.3 will be free to exert its force on the motorl wheel ,72 and the ratchetl 90.

120,V A The .bg son being -in engagement 4with' the teeth of the ratchet and connectedwith the upper end 'of the arm 91 will be moved with the ratchet and the arm thus swung until its lower end engages with one of the stop' bars which has been projected into its path; -The movement or rotation ofthe motor'wheel is thus govcrned by the distancefwhich the stop arm swings before coming in contactWith-one of the stop bars which win be hersenen Aie-- scribed. Thisswinging.'movement of the crank 60 also causes its arni 60 to be" .'510). V he bolt 96has its upper end fred-ucc and adapted -to engage between the teeth of th-locking ring .88 ani thus lock the :motor drive Wheel'and partsagainst movement'untilit is moved downward by the arm 60 whichv actionwithdraws its reduced end from the teeth of, the locking ring, thereb';v leaving. the arts' f ree t`o move., When the pressurejonl enumeral key which has moved thereeiprocating frame 55, is relieved7 the fi'pringZyreturns the frame and the bell rankto'th'eir original positions. The retu'mjm'ovemeixtof the bell crank, causes its arm-60* .andthe lever 6 0d to be swung up.

ward; thisjupward"movement of the lever 60d-raisesthe release plate 92 as will be apparente The pin 94 resting Somewhere in the curved slot 92b according to the distance 'which the s top armhasbeen swung, is raised as the release plate moves upward. By this ,action .the ldog 94 -is raised outI ofcontact [With'tlie teeth of the ratchet 90 and the'arm thusl released.` 'As before described Athe spring 93 coiled about the extension 91 of the stop arm having been wound ortwisted upon the initial movement of the arm, now `serves to unwind and return the arm to its original position, the `pit1 94 traveling along the slotj92A and dropping into the seat 92",- thus preventin `furt ermovement of the arm and allowing t e dog 94 to a ain engage the teeth Aof the ratchet 90. As escribed, simultaneous .withjthis movement ,the arm 6WL swinging upward, moves the bolt 96'upward. This l'lfetuln movement of the bolt 96.accomplishes a. double function, that of locking the motor wheel against movement and'at the same time imparting' to the motor drive wheel a shghtreverse movement. The necessity for this slight reverse movement is caused b v' the fact that when the drive wheel is released to move any one of the numeralwvheels, it.

slightly over-throws the saine, so as to assure the proper movement of the said numeral wheel, It will therefore' be, ,apparent thatV some means to otisetthe slight overthrow f-finu'st be provided'. This movement of the l drive wheel 72 is accomplished bv providii'ig `the' bolt 9.6 with an offset slot 96" through which'projects a in 96. A curved arm 9G'l projectsupward y from the extension 96"' and' supports the end of a coiled spring 9G" 60 which isv connected to the bolt 96 as shown in Fig. 10. -When 'the bolt isforced downward. the offset slot and pin cause it to bc moved toward the bracket 23` against the tension of thespring 96 so that when the bolt is forced upward, its reduced end enters between the ext-reine ends 'of the teeth of the locking ring:

-the'spr'ing 96" farting with the oll'sei slot iluparts a sliglltllateral movement tothe bolt, thus causing it to impart a slight reverse movementto the locung ring and drive `wh'eel as itcoi'npletes its upward movement.

This movement is very slig to offset th'e `overthrow, l

'From the f orcgoing it will. be obvious. that it, nierelxY enough by varying the distance which the stop arm 91` swings, the` relative movements of the inotor drive wheel T2 may be varied and thus the revolving of the numeral wheels controlled. For this purpose we arrange. between the angular extension .33 andthe bracket T23 a horizontal rod 97 which supports the horizon-tal or latcrallywinoving slottedportions of stop bars 112:13, A* 'and A5. These stop bars are arranged on the saine side of' the typewriter as the numerals 2, 3, 4 and 5i the stop bar A being arranged to be operated by thcnumcral 2 key, the stop' bar Si being adapted to be operated by the numeral 25 key and so on. Each stop bar is provided near thcr lower end of its. downwardly inclined portion with 'a slotted portion engaging about a suitable pin 98 projecting from thc bracket. 23. The bars'are thus slidingly or reciprocatingly supported on the pin 9S and rod 97. For'holding the stop bars-in position, light springs 99 areV .interposedbetweeh the lower ends of thel stopbars and the sides of the angularl frame l2. lach of the stop bars is provided with a downturned footy portion ol" different lengths, so `as to terminate in juxtaposition to cams 99 mountedv on the rock shafts 54 l(see Figs. .6,.7 and 8.) 'The cams rest in contact with the foot portions of the stoplevcrs so that referring to Fig. 8, when one of the numeral keys from .Z'to 5l inclusive is depressed, the cam mountedA on its respective shaft will bc rocked downward and bearing against its stop bar will' move the saine to the right and against the tension of'its spring 99, so that the-stop bar will bc returned to its normal position when pressure on the numeral key released. 0n their upper ends the stop bars carry upwardlv extending right angular stops B?, Bi", B4 andB5 as illustrated in Figs. Jr' and (i. The stops are stepped so that the lateralhv projecting portion of one is a step higher than the next lowest one. stop Bf is formed on the stop bar A2 which 'is connected to the' numeral 2. key, while the stops Bff, B4 and Bs are connected tothe 3, 4 and 5 numeral keys respectively: Therefore thc higher thc denomination of the numeral key depressed, the higher the stop projected. These stops arc projected into the path ofvthe swinging arm 91, the lower end of which arm isadapted to engage with the underside of. the lati-mlbv project ing portion of the stops, each of which portions are inclined so as to make a perfect contact. It will be obvious that the B stop (see Fig. being higher up than the B2 stop, the arm 91' will move a 4greater"distance when allowed to swing to the stop B5. than when the stop B2 is` projet-ted into its path. The stops being thus graduated or stepped, the movements of the 'motor' parts are eontrolled `to a predeter by the numeral S key.

mined degree. For-'taking care of' the' numerals 1. 6, T. S and 9, we provide ditlerent constructions. l" or the numerals (3. 7 and S, we prov-ide stop hars C, nd C* pioted on a shaft 1 ()0 extendinghetw een the lower end of the angular extension 253 and the bracket 23 as illustrated in F ig. (i. 'lhese swinging stop ba-r's are slightly heiit and have an angular shape, their lower portions terminating in juxtapositioii to )anis .1011 mounted on the rock shafts 5.4i rfonneeted'with the Gf?" and b" .numeral keys: the :swinging stop har C "being eonnected'with the numeral il l e \','the swinging stop har with the numeral T key `and the swinging stop har Cs with the numera'S key. At their upper ends the swing ngst'op hars are prox'idedwith stops D, D7 an'iLD; substantially the saine as the .stops B2, B? ete. For the numeral Si, we provide a `lixeiil'stop 102 projecting laterally into the `path of the Qwinging arm trom the upper end ofthe extension 33 (see Fig. (i). This fixed Stop as will he apparent` is arranged one step higher than the stop 1)* which irs controlled -it the lower end vol the hank of stopswe arrange a stop F) pro jet-ting liirwardhv from the upper end of a pivoted stop lever E? pivoted on the rod 100. The Stop lever is connected helowits pivot point with a A"spring` 103 secured to the hracket 23 as shown in Fig. T, while its lower end terminates in juxtaposition to a rocker cani -1 04 secured on the rock :shaft :34 connected to the numeral 1 key. The stop El heilig the lirst of the bank and nearest to thelower portion of the stop arm 91, when projected into the pathvof the said arm, will allow the arm to more only a slight distance or suilicient to permit the motor drive wheel to revolve the numeral wheel with which it has` heen engagged, one digit or ligure, ywhile should the numeral 5 key of the t vpewriter he iilepressed rcausing the stop har A5 to project its stop B5 into the path oi the swinging arm the motor drive wheel-will hc pernntted to rerolre the 1 riage 4 has `traveled a. portion of its movement, we support from the right hand end of the typewriter har 5 hice Fig. 4l and the bar 83, an angularl)v disposed plate 105 which is adapted to engage the upper end of a bell bracket 107 mounted on the tahulator frame 1l and has its lower end norn'ially engaging e on the lower portion of the said lot'liing lever.

. holdsit `in the position ust descrihed. while a lug 109 formed on the hracliet lll? is ahutted h v the upper ai'in ofthe lever; thus pre Venting -the said leveri'rom heing swung too far downward. 'hen t-he upper end ot' the ylever engagedln theplate 105. it is de.

pressed'so that its lower "end is raised oiitjrtit engagement' with the lockingr'iig against f the tension of the spring 10h' andleavingithe motor free to he operated. \\'hendthe.lair 105 is moved out of engagement withzthe locking lever. thlle spring-10hl serves to` throw the `ame into e gageinent with the locking ring .wand thuslock the motor against From the foregoing, i.twill he apparent that the operator is enahled to nianipulate the numeral keys until the carriage f reaches a certain point without releasing the motor. therein' not alt'eeting vth'c numeral wheels which are adding the sums set down? in the tabulated columnsat the right hand side'of the sheet. We will now Aproceed to give the general o )eration ol' the parts during an addition.

or instance. we will suppose that the operator is making out a statement and tahulatf ing the ligures at the right hand side ol `thesheet inthe usual manner. and we will sup pose that he is ahout to write the.- sum $550.91. lle depresses'the tahulatoi key 9 under the :s vmhol who() to positionthe cal; riages. As the lirst ligure of the sum A'tohe added is in the ten thousands column. the

third to the lel't of the decimal point. it is ohrious that the ten thousands numeral wheel or third wheel from the decimal :spat-e. must he moved into engagement "with the motor drive wheel 7;. therefore when the tahula'tor 'key is depressed to position the carriage,

42 rides oli' the end of the lever thus al-l lowing the spring 4G to swing the lu-g 4.3 out of engagement with the leat spring 4T. thus releasing therarriage. Simultaneously with this movement, the hridle 4l) is swung out-.

ward rocking on its arm Si, which depresses the hell erankflever Il? (see lrig. 14). The upper end 'ot the"hellcrmik lever heing swung inward,v moves the shaft B4 longitudinally,

vcrank locking lever 106 when the carriage has Abeen moved to the point at which-itis de sired to begin registering tliel'igures set down.

This locking lever is pivotally sn|`iported on a thus moving the esrapement 31. bodilyv outot' line and engagenimit with the escapement liar 3l). rl`hese movements heing completed, the counter carriage is drawn hy thetapc 2T on the tabulator key', the'stop levers are re-, turned to-their. normal positions '-)mdgth'el bridle swung. downwardfto its "normal, position. by its spring 4 1, thusallowingthe'spring 35 to draw the escapement 31'into engagement with the escapement bar -30 and thus loc'k the counter-carriage in n' osi'tion. The carriages being thus. ositione the operator depresses the typewrltler key 4bearing the numeral 5, thus printing the 4numeral 5 on the sheet in -itsproper place and atV the same time rocking the shaft 54, The rocking of the shaft 54 causes its cam 99 to be swung downward and to" ride against the stop har A5, which is moved laterally, so that its stop Bs is projected into the path of the swinging stop arm 91.- The rockin .of the shaft 54 Ialso through its arm 58 an( pin 59, slides the frame 55 which swings" the lever 60 by means of the pin 61. i

,The lever 60 on being swung, draws the bolt.96 downward outof engagement with ring 88 and simultaneously swingsA the lever 95 downward. The lever 95 beingconnected to the release plate 92,' draws the same downward so thatl the seat 92" (see Fig. 5) is moved from about the pin 94". y This leaves t-he pin 94 free-to travel in the slot 92h so' that the Amotor spring 7 5is fre-e to revolve the drive wheel 72 and swing the stop arm 91 through the agency of, the dog 94 and the ratchet whe'el 90. T he motor will revolve until the Iower'end of the arm 1 contacts with the underside. of the sto 5 which has been rejected intoits pat This revolution ofp'the motor drive wheel is suilicient to revolve the ten thou'- sands numeral wheel with which it is ,in engagement, tive digits or figures; The operator now relieving the pressure on the numeral 5 key of the typewriter, the spring 9W connected to the stop bai-.A5, ret-urns the saine to it-s normal position, while the sprintr 62 serves to slide the frame 55 to its norlnalposition through the medium of the pin'l and the lever 69' which is likewise returned. The return'movement of the lever GU'throws the lockA bolt 96 up into enga-gement with the lockingring S8 and at the same time swings the lever 95 upward, which in turn moves the release plate 92 upward. The upward movement of the release plate by means of the pin 94 raises the dog 94 out of engagement with the teeth of the ratchet 9.0., .Upon

this movement, the spring 93 which has' been twisted or woundlby theswinging of -thevstop arm Unwnds and swings the. arm back to its normal position. the nu 94 dropping mto the seat 92" andnllowmg the dog 91 lo again engage with -the teeth of the ratchet 90.

When the frame 55' is returned by the spring .52, its lug 56 engaging with the pin 51 of the crank shaft 5t), swings the latter so that the arm 49 is swung downward causing the arm 36 to also be4 swung downward by means of the link 48. This movement of the arm 36 oeks 'the escapement- 31 so that the counter carriage is allowed to move two steps or two teeth oftheescapement bar'39, thus` bringing the' n'e'xt lowest numeral wheel or thousands 1wheel into mesh with the motor drive wheel. 'The o erator now depresses the numeral 8 key, w 'eh it will be observed is on the opposite side of the typewriter.l The depresslon of the numeral S. key, causes la similar operas tion of the parts as the depression of the numeral 5 key, except as tothe stop bar. The depression of the numeral. S'key rocks the shaft 54 connected thereto, which through its cam 10] swings the lower end ofl the stop bar C downward, thereby projecting its top D8 at its u v)er end into the )ath of the stop arm 91. 'Fie stop B*` being higher up in the bank of stops and farther away from the Starting point ol the stop arm, the latter is allowed to swing further when released, thereby permittingr a longer revolution of the drive wheel or a sullieient movement to revolvethe thousands wheel 8 digits or figure 8 The pressure beingr relieved on the numerals. key, the artslreturn to their normal osi- .tions, vas: in the ense of the numeral5 ey.

The next symbol being zero, it will be ap arent that no movement of the hundredsw eel is required. been moved so that its hundreds wheel is in The counter carriage having' mesh with the drive wheel in-the mannerabove described,-the o erator'now depressies the zero or O kev, which rocks its shaft 54, The shaft 54 being `connected neither Awith the. stops nor the frame 55, the same remain inoperative, but the arm 53 on the shaft is swung u ward so that the loop 52 (see Fig. 7) swings 't 1e crank shaftl 51) by means of the in 51 to operate the eseapement 31 and .allrdw the count-er carriage to' move two spaces so as to bringthe tens wheel into mesh with the motor drive -wheel,` the spacing of, the teeth on the eseapement bar permitting the, counter carriage to move over the decimal space.' The operator now de )resses the key9 which through its rock'shait 54 moves, the

trame 55 to release the motor and the swinging stop arm. .lshereinbefore described the fixed stop is employed when 9 is added, therefore the arm 91 is allowed to swing and the motor revolved untilthe arm engages -with thestop 102, the movement of the motor serving to revolve the tens .wheel 9-igures mzdigits, thus 'addinur 9. Pressure being reheved on the numeral 9 key, the parts are re- 

